WIND POWER

Wind Power

You can generate electricity at home with small-scale wind turbines. Wind turbines harness the power of the wind and use it to generate electricity.

The benefits of wind turbines

Cut your electricity bills: Wind is free, so once you’ve paid for the initial installation your electricity costs will be reduced.

Get paid for what you generate: Through Feed-in Tariffs, you get paid for the electricity you generate even if you use it. What you don’t use, you can export to the local grid – and get paid for that too.

Store electricity for a calm day: If your home isn’t connected to the national grid you can store excess electricity in batteries and use it when there is no wind.

How do wind turbines work?

Wind turbines use large blades to catch the wind. When the wind blows, the blades are forced round, driving a turbine which generates electricity. The stronger the wind, the more electricity produced.

There are two types of domestic-sized wind turbine:

Pole mounted: these are free standing and are erected in a suitably exposed position, often about 5kW to 6kW.

Building mounted: these are smaller than mast mounted systems and can be installed on the roof of a home where there is a suitable wind resource. Often these are around 1kW to 2kW in size.

Costs

The cost of a system will depend on the size and the mounting method. Building-mounted turbines cost less to install than pole-mounted ones, but they tend to be less efficient.

For equipment and installation:

a roof-mounted 1kW micro wind system costs up to £3,000

a 2.5kW pole-mounted system costs between £5,900 and £19,000

a 6kW pole-mounted system costs between £18,000 and £30,000.

Maintenance

Maintenance checks are necessary every few years, and will generally cost around £100 to £200 per year depending on turbine size. A well-maintained turbine should last more than 20 years, but you may need to replace the inverter at some stage during this time, at a cost of £1,000 to £2,000 for a large system.

For off-grid systems, batteries will also need replacing, typically every 6 to 10 years. The cost of replacing batteries varies depending on the design and scale of the system. Any back-up generator will also have its own fuel and maintenance costs.

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